Coiling-machine.



PA TENTED APR. 23, 1907. S. W. BALDWIN.

COILING MACHINE.

APPLIOATION FILED MAR. 14, 19-04. RENEWED SEPT. 29. 1906.

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No. 851,152. PATENTED APR. 23, 1907. s. W. BALDWIN. 001mm MACHINE.

PATENTED APR. 23', 1907 S. W. BALDWIN. GOILING MACHINE. APPLICATION FILED MAR. 14, 1904. RENEWED SEPT. 29, 1906.

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7 hi5 az-wrn I PATENTED APR. 28, 1907.

's. W. BALDWIN.

GOILING MACH APPLICATION FILED MAR. 14, 1904. RENEWED SEPT. 39. 1906.

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UNITED STATES PATENT OFFICE.

COILING-MACHINE.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed March 14,1904. Renewed September 29,1906. Serial No. 336,804.

To a, whom it may concern.-

Be it known that I, STEPHEN W. BALDWIN, a citizen of the United States, residing in New York city, Manhattan borough, in the county of New York and State of New York, have invented certain new and useful Im rovements in (hfiling-Machines, of which tiie following is a specilicatimi.

This invention has reference to the formation of coils and helices, through the instrunmntality of a general train of mechanism, which involves continuously revolving or traveling means operative to simultaneousl feed the stock and l'orm the same into coi s and helical springs.

By means of my present improvements the coil may be formed by conducting the rod into an annular space between a central guide and an exterior forming instrumcntality or ceiling device, supported and adapted for having a emitimiously traveling movement, which may preferably be about coincident with the rod, and by this means the bending of the rod can be ell'eeted by the concurrent action of the two guides, one inside and the other Out/tilde ol the cell which 18 being lormed. The outer member may completely encircle the coil in process of formation, and by reason of the peculiar manner by which the exterior coil forming-momber operates to bend the red by pressure from without the coil, such member should preferably be positively driven in order to produce the most desirable mode of action, more especially when the coil is of relatively small diameter as compared with the diameter of the rod or tube of which the coil may be formed. in some cases it may be sulliciont in practice to positively drive only one of the two forming devices, as for instance the outer member, whether this is of such a character as to fully encircle the coil or only to partially encircle the same.

The use of a traveling former is contemplated and may be in the form of a band or chain which during its movement will'feed and form the stock by the co-operation of a former which may be in the nature of a mandrel or an arbor. Such mechanism as may be employed for this purpose, will of course, be suitably constructed to produce coils from various thicknesses of stock, and at'the same time may also be so constructed as to produce convolutions of various pitches. In order to effect such results in such a train of mechanism, the adjustment of certain component parts of the mechanism may be provided for.

A variety ofpractical results will be obtained by a mechanism, such as is here referred to, and which will be more fully hereinafter set forth in this specification.

The use of continuously traveling means will exert a bending influence upon the various portions throughout the entire length of the stock, thus imparting to the extremity of the stock the same relative formation as the coil receives throughout other portions of its length.

The proper equi-distancing of the various convolutions of the coil or spring is a further feature which is provided for by the present invention.

In the drawings accom anying and forming a part of this specifiizatlon an embodiment of my invention is disclosed and wherein Figure l is a side elevational view of a coil forming machine. Fig. 2 illustrates a top plan view of the same. Fig. 3 illustrates an end view of the forming mechanism. Fig. 4 illustrates in side elevation and partially in section, a portion of coil-forming mechanism. Fig. 5 is an end view thereof. Fig. 6 is a view similar to Fig. 4 illustrating another form for forming the coils. Fig. 7 is an end View thereof. Fig. 8 shows side and end views of one form of element or the traveling means. Fig. 9 shows similar views of another form thereof. Fig. 10 illustrates an end view of a traveling element. Fig. 11 shows a top plan View thereof, and Fig. 12 shows the traveler in its connection and operative position on the driver.

In the embodiment of the present invention, the assemblage of parts may comprise, in a general way, a base 10 from which extend standards 11 and 12, which may be strengthened by webs 13 and 14, and from this base may also project another standard 15 located transversely to the first-memtioned standards, or parallel with the longitudinal axis of the base, and which is preferably disposed laterally of'the central line thereof.

Suitably mounted in bearings 16 and 17, which are located in the standards 11 and 12 respectively, is a driving shaft 18, upon which is mounted a driving pulley 19, and which may be operated from any suitable source of power. A secondary or-driven shaft is suitably ournaled in bearings 21 and 22, which are also located in the standards 11 and 12, and this shaft 20 is designed to operate an arbor 23 which may be either connected to said shaft or integral therewith. Rigidly mounted on said shaft 20 is a spur gear 24 which is suitably secured thereto, for instance by a collar 25, and meshing with said gear 24 is another spur gear 26, which is suitably secured to the driving shaft 18, for instance by a collar 27. The ratio between these two gears 24 and 26 respectively, being so suitably proportioned as to cause the arbor 23 to rotate in such suitable relative relation to the rotation of the drivnig shaft 18 as the case may require, it being understood that in accordance with the different kinds of work to be performed, such differences between the rotation of thedriving and the driven shaft may be varied to suit special conditions and results to be accomplished. Located in suitable relation to the driving shaft 18, is another driven shaft 28 which is journaled in bearings 29 and 30, which may also be carried by the standards 1 and 12. These bearings 29 and 30 are disposed at an angle with respect to the bearings heretofore mentioned, so that the shaft 28 which is thereon mounted, .is likewise disposed at an angle to the other shafts heretofore mentioned, for instance, as clearly seen in Fig. 1. The shaft 28 carries a driver, designated in a general way by 31, designed to operate a continuously traveling forming means which is operative to feed the stock and simultaneously form the same into coils or springs, and is designated in a general way by 125. The shaft 28 is driven by a spur wheel 32 the teeth of which have slanting faces in mesh with a pinion 33 on the driving shaft.

The bending or forming means may comprise any suitable traveling device and, in the present instance, is shown in the form of a chain comprised of a plurality of links, designated in a general way by 34, which may be united one to another by any suitable pivots as for instance pins 35, and for the purpose of propelling said chain, the periphery of the driver 31 may be provided with suitable engaging elements 36 which, in the present instance, may comprise teeth adapted to engage the chain, and, for the purpose of maintaining the chain upon the periphery of said driver, and in engagement with said teeth, the said wheel may be provided on each side with flanges 37 which form a peripheral groove about the wheel in which said chain is located.

In the illustrated form of chain each link is provided with a projection or tooth 38 provided with a wall, presenting a concave face 39 adapted to engage the stock indicated by 40 as it roceeds from a stock guide. A guide is il ustrated at 41 for such purpose.

The forming device may co-operate with the arbor 23, and in the present illustration is convoluted about the same which forms a bearing therefor, and upon which the faces 42 of the elements thereof travel, for instance as seen in Fig. 5, and the concave walls 39 of these elements in part form a channel through which the stock is directed, and owing to the convoluting of the traveler about the arbor it is spiral. This channel is bounded by the faces of the elements of the traveler and the face of the arbor, and it is by these faces that the stock is frictionally gripped and carried through the'forming operatlon. The forming of the stock is produced by co-operative members having between them an annular s ace or matrix in which the coils are made an one or both of which members may be driven during the forming operations. 1f it-is desired that the traveler or chain shall be convoluted about the arbor as above described, the elements thereof will have their working faces located to one side, as for instance in the manner seen in Figs. 4 and 9 respectively, and in this way 'the two convolutions or turns of the traveling chain will form a continuous channel in two convolutions. However for some purposes, if desired, the'traveler or chain may be simply passed about the arbor once, as seen in Figs. 6 and 7, and the working faces of the links of the traveling element will be centrally disposed with relation to each link whereby the same character of channel is produced as shown in Fig. 4. The feature of centralizing the working face of the link as just referred to is further illustrated in Figs. 8, 10 and 11. If it is desired to use such a traveler, the organization of the chain driver 31 will be slightly varied as to its peripheral construction to meet the requirements of practice. Engaging portions of the driver may be at each side of the periphery and comprise teeth between which the pintles 51 will be received, as seen for instance in Figs. 10 and 12. While of course any suitable formative means may be employed in this mechanism, the style of chain just referred to may be deemed preferable because of simplicity of operation as well as manufacture thereof. This chain is provided with a depending centralized formative element, designated in a general way by 52, comprised of two plates 53, each having a working face 54, and a number of side plates 55 having working faces 56, constituting formative channels 57 and 58 which may be suitably formed upon the face of the chain by stretching the latter out flat, and causing a planer or grinder to be run along either side of the centralized portion 52 thus forming said channels. The outer forming member of the device is comprised of-a series of articulated units and each unit of such forming member; in the present illustration each link of the chain is a unit; enters the spiral with a length of stockengaged by it as it, the link, is about to enter into the circular formation and such unit carries the said length of stock with it throughout the spiral and leaves the spiral as the said length is ejected therefrom in the form of finished product. A series of units is illustrated, a constituent portion of which comprises a formative member, and upon the shifting of the series said formative member, considered as a parcel of the units, shifts and its component units change. It draws units from and returns a like number of units to the inactive, non-working, portion or contingent of the series. Although it is necessary to continuously shift this formative portion of the series, and in some instances the idle part might be relatively insignificant, yet it is nesessary that some means be employed for the series, and in the present instance a comparatively large number of the units will always be inactive, so far as the direct Work of formation is concerned, but will be active so far as the driving thereof is had.

For the purpose of directing the move ment of travel of the chain during the operation of forming the spirals there is provided suitable guiding means in the nature of a cam 60 which is located at the arbor 23 and is secured to a portion of the frame by bolts and els for a distance through a housing 70, which operates to confine the travelerin a predetermined working position, the walls 71 and 72 of said housing will be so situated as to permit the chain to travel therethrough in various angular positions according to its adjustment.

For the purpose of delivering the formed product any suitable means may be adopted,

. such for instance as that shown, which consists of a trough 75 mounted upon the standard 15 which will'be adjacent to the end of the arbor 23 and through this trough will travel the finished article, designated by 100, as seen for instance in Fig. 2. The stock as heretofore intimated may be fed through a stock guide suitably located in continuity to the formative traveling member, preferably at a point where the elements of the formative member are just about to pass around the arbor, as for instance as seen in Fig. 7. The form of chain illustrated in Figs. 10, 1.1 and 12 ermits considerable freedom of the chain .an its parts as to movements independently of its precise Working movements, and the organization of the chain is such that shuckforming member.

of my invention.

ing and torsion will occur, when induced, without disorganization of the chain, or permanent displacement of its working faces.

As has been before stated there will be a proper and suitable proportioning of the relative ratios of the gearing thus insuring a proper relative speed, between the driver 31 and the arbor 25 whereby to facilitate the proppr forming of the springs or coils.

T e modus operandi of the mechanism in its present form will be the introduction of the stock into the stock guide from whence it is passed between the arbor and the forming means, and by a frictional grip the stock will be drawn around the arbor during which time the pitch of the convolution will be determined in accordance with that angular relation which the chain will bear to the arbor so that the up-coming of the convolution will continue around the spiral channel hereinbefore referred to and continue to peel off the arbor, as shown for instance in Figs. 4 and 6. v

The rotation of the shaft 18 will through the instrumentality of the gearing 24 and 26 rotate in an opposite direction to the shaft 20 whereby the arbor 23 will be likewise rotated. At the same time through the instrumentality of the gearing 33 and 32 the shaft 28 will be rotated in the same direction as shaft 20 as likewise will also the driver 31 whereby the traveling formative means will be operated so that it will pass around the arbor 23, as has been heretofore pointed out.

It will now be seen that I have embodied in a suitable train of mechanism effective means for producing coils or helices from straight stock through the instrumentality of a traveler composed of elements which operate in part as means to form said coils and that by the use of traveling formative means the formation of the spring coils is accomplished with a minimum of friction.

It will be noticed that in the form of the invention illustrated that the chain driver 31 is of considerably larger diameter than is the arbor 23, and that while the chain or traveling forming member is wound around the arbor the faces of the working portions of the links lie close together and a practically continuous working surface is formed, particularly in the portion which, at any par ticular time, will constitute the annular But when the chain is spread out around the driver the faces 90 will hang away from the line made up of the axis of the pivots so that the faces 91 will han away from the faces 92 and give an eflicient bearing for the abutments of the driver to engage against such faces 91 and 92 being in engagement in the chain when traveling around the arbor in the preferred form It will also be noticed that such train of mechanism as has been lierein shown and illustrated is simply one embodiment of the invention, and that any suitable device or devices adapted to accomplish the same purpose without departing from the broad general principle of t is invention may be resorted to within the sco e thereof. It will be further understood t at the-driver and its traveler may be dis osed at will in various angular relation wit respect to the arbor so that coils of different pitches can be produced.- In like manner it will also be perceived different sizes of chains may be employed for the purpose of making coils from different sizes of stock.

This invention is adapted to the manufacture of coils of various descri tions and for numerous purposes, the coi s may be springs, and the stock may be pipe, if it is desired to bend pipe into the shapes contemplated by this invention.

' Having thus described my invention, I

claim 1 1. Means for dproducing s irals and embodying a man rel, an end ess chain continuously moving about said mandrel and working faces upon said chain to engage the stock and press the same against the mandrel and into substantial conformity with the surface thereof.

2. Means for bending a blank into spirals and comprising a cylindrical body, an endless chain wrapped around the same and continuously rotating, and working faces upon said chain presenting a continuously changing but constantly uniform substantially annular working face about such body, and adapted to receive a blank and sha e the same into substantial conformity to the said working face and said body.

3. The combination with a mandrel having, a cylindrical conformation, of an endless chain co-operative therewith in the bending of a stock rod, and each link of the chain having a working face, and a bearing face to run upon said mandrel, the various working faces upon the links constituting segments of an annular working face when the links are in working position about the mandrel,

, and a chain driver of larger diameter than the mandrel and having faces or abutments to engage the end faces of the portions of the links carrying said working faces and which said faces upon contiguous links come into contact during the time such links are in their active position and wrapped about the arbor.

4. In a machine for bending a blank into spirals, the combination with amandrel having a cylindrical conformation, a chain driver of larger diameter than the mandrel,

an endless chain wrapped about the mandrel and running upon the driver, each link of the chain having a portion carrying a working face to co-operate with the mandrel in engaging and forming the blank, such portions of the links having engaging faces, abutments upon the chain driver to engage therewith in the propulsion of the chain, and such faces abutting each other when in the working position about the mandrel, and a face upon each link to engage a 00-0 erative face upon the working portion of t e link when the chain is in its working position, to the end that the linkswhich are in the Working osition at any time will present substantia ly a rigid organization. e

5. The combination with a; member having a cylindrical surface, of a device co-operative therewith in bending a blank and comprising a number of articulated units each aving a bearing face to run upon said member, and a working face constituting the segment of an annulus when its bearing face 1s upon said member, a driver for said device having engaging faces adapted to engage the radial'faces of said segments, faces on said units so organized that when the bearing faces are upon said member each'segment will be closed against the adjacent unit and when they are assing' over a driver of larger diameter t an the said member each segment will hang away from the adjacent unit, and a receiving and forming member adjacent to the said member.

6. The combination with a member having a cglindrical surface, ofa device co-operative t erewith in bending a blank and comprising a number ofarticulated units each aving a working face constituting the segment of an annulus when in working position, a driver for said device having engaging faces adapted to engage the radial faces of said segments, faces on said units so organized that each segment upon said member will be closed against the adjacent unit and when they are passing over a driver of larger diameterthan the said member each segment will hang away from the adjacent unit, and a receiving and forming member adjacent to the said member.

7. The combination of a series of units pivotally connected into an endless chainlike body, a constituent ortion of which units comprises when con ed in a curved line a formative member; a former about which the said portion is wrapped and mov-.

able; means to shift said body; and upon the shifting of said body said formative member considered as a parcel of indefinite units shifts and itscomponent units change; and means to feed a rod to said formative member.

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8. The combination with a forming manmovement of the working portions of the mandrel and chain one relative to the other; and means to feed a bar between the mandrel and the chain.

9. The combination with a mandrel, of a body comprising an articulated series of units, a portion of which is wrapped and movable about the mandrel and presenting thereto a spiral working face constant as to its shape but continuously shifting as to its component units, and each unit, as it is about to enter said spiral, engaging a length of the stock and remaining in engagement therewith until the same passes from the spiral as finished product.

10. In a spiral coiling device, the combination of a former for the interior of the coil; a number of units pivotally connected together into a body resembling an endless chain and having a portion of said units eonvolving about said former to constitute a former for the exterior of the coil; and means to move the units and thereby change the individuals constituting said exterior former and to continuously move the latter about said interior former.

1].. in a machine for bending a blank into spirals, the combination with a mandrel having a cylindrical conformation, of a chain driver of larger diameter than the mandrel, an endless chain wrapped about the mandrel and running upon the driver, each link of the chain having a portion carrying a working face to co-operate with the mandrel in engaging and forming the blank, each of such portions having a face on a plane embracing the axis of the mandrel, and such faces abutting each other when in the portion wrapped about the mandrel, and a face upon each link to overlap a face upon the adjacent link when in such portion, to the end that the body of links which are in such portion will present substantially a rigid organization.

12. In a machine for bending a blank into spirals, the combination with a mandrel having a cylindrical coniormation, of a chain driver, an endless chain wrapped about the mandrel and running upon the driver, each link of the chain having a portion carrying a working face to co-operate with the mandrel in engagingand forming the blank, each of such portions having a face upon the front of each link to overlap a face upon the rear of the preceding link when in such portion, to the end that the body of links which are in such portion will present substantially a rigid organization and each be locked or clamped in position by the link following it.

13. in a machine for bending a blank into spirals, the combination with a'mandrel having a cylindrical conformation, of an endless chain wrapped and movable about the mandrel, means to spread the sides of the chain a distance greater than the diameter of the mandrel, each link of the chain having aportion carrying a working face to co-operate with the mandrel in engaging and forming the blank, each of such link portions having a face at each end which willcoincide with a plane embracing the axis of thewrapped portion of the chain when the link is in such 14. In a machine for bending a blank into spirals, the combination with a mandrel having a cylindrical conformation, of an endless chain wrapped and movable about the mandrel, means to spread the sides of the chain, each link of the chain having a portion car rying a working face to co-operate with the mandrel in engaging and forming the blank, each of such link portions having a face at each end which will coincide with a plane embracing the axis of the wrapped portion of the chain when the link is in such wrapped portion and such faces abutting each other when the said portions are in the working position about the mandrel, to the end that the links which are in the working position at any time will present a substantially continuous Working face, and each. of said links having a face to lock in working position the link preceding it in such wrapped portion.

15. The combination with an inner forming member, of a series of members articulated together and each member having a working face, a substantially constant portion of said series being wrapped about said .inner forming member and constituting an outer forming member, the portion of units comprising said outer forming member having between it and the said inner forming member an annular working space, and means to shift said series of members to continuously change the units entering into the said portion constituting such outer forming member by adding members to one end and taking members away from the other end of said portion.

16. The combination with a series of units connected together into an endless chain, a constituent portion of which uni ts comprises when describing a curved line a formative member, a former about which said portion is wrapped and movable, means for shifting said complement of units constituting the formative member and changing its component units, and means for feeding a rod to said formative member.

Signed at Nos. 9 to'l5 Murray street, New York, N. Y., this 5th day of March, 1904.

STEPHEN W. BALDWIN.

Witnesses:

CHAS. LYON RUssELL, FRED. J. DOLE.

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